CAJ | 학술논문

研究了在发送相关信道场景下,综合利用统计信道状态信息和瞬时信道状态信息的多波束选择算法.与传统的基于码本的传输方案不同,基于单信道质量标识反馈的多波束选择算法利用统计信道状态信息决定其最佳的波束矢量,每一时隙只反馈信道质量标识,而且该算法的性能与传统方案基本相近.为了进一步提高平均和速率,提出了基于双信道质量标识反馈的多波束选择算法,该算法决定2个最佳统计特征方向,并且每时隙反馈双信道质量标识.理论分析和仿真结果表明:基于双信道质量标识反馈的多波束选择算法可以增加多用户分集和复用增益,具有更高的平均和速率.
연구료재발송상관신도장경하,종합이용통계신도상태신식화순시신도상태신식적다파속선택산법.여전통적기우마본적전수방안불동,기우단신도질량표식반궤적다파속선택산법이용통계신도상태신식결정기최가적파속시량,매일시극지반궤신도질량표식,이차해산법적성능여전통방안기본상근.위료진일보제고평균화속솔,제출료기우쌍신도질량표식반궤적다파속선택산법,해산법결정2개최가통계특정방향,병차매시극반궤쌍신도질량표식.이론분석화방진결과표명:기우쌍신도질량표식반궤적다파속선택산법가이증가다용호분집화복용증익,구유경고적평균화속솔.
This paper investigates the multi-beam selection algorithms for transmit correlation channels by using statistical channel state information (SCSI) and instantaneous channel state information. Unlike the conventional codebook-based transmission scheme,the proposed multi-beam selection with the single channel quality indicator (CQI) feedback (MBSSCF) algorithm determines the preferred beam vector by exploiting the SCSI and only feeds back CQI at each timeslot.The performance of the MBS-SCF algorithm is nearly the same as that of the conventional scheme.In order to further improve the average sum rate,a novel multi-beam selection with the dual CQIs feedback (MBS-DCF) algorithm is proposed,which determines dual preferred statistical eigendirections and feeds back dual CQIs at each timeslot. The theoretical analysis and simulation results demonstrate that the MBS-DCF algorithm can increase the multiuser diversity and multiplexing gain and exhibits a higher average sum rate.